HOG-LOUSE 653 



straw-stack, and this straw has become filled with lice, little good 

 can be accomplished by dipping the hogs and allowing them to go 

 back under the straw and become re-infested from the lice hidden 

 there. These old stacks must be burned or the hogs turned into 

 another feed lot where they will not come in contact with the 

 parasites. 



In ridding a herd of Uce we have then to consider: (1) The de- 

 struction of the Hving lice on the animals at the time of treatment ; 

 (2) the destruction of the eggs or nits; (3) the cleaning up of the 

 quarters so as to prevent re-infestation. 



Fig. 90. — During seasonable weather a weekly dip in a concrete tank con- 

 taining 12 barrels of disinfecting solution keeps every pig clean, free from 

 vermin, comfortable, and in perfect health — a great improvement over the 

 usual disease-breeding "wallow hole" too common with hog breeders. Tank 

 at "The Cedars," Columbus, Ohio. 



Use of Dips. — For the purpose of destroying the lice on the 

 body of the animal there are a number of dips which are quite 

 effective. In former years arsenic, tobacco, and sulphur were quite 

 commonly used as agents. In the past few years there have been a 

 number of coal-tar preparations introduced which are very effect- 

 ive, reasonable in price, and convenient to handle. Creolin, lysol, 

 kresol, and liquor cresolis compound are good examples of this class 

 of disinfectants. They are sold under a large number of different 

 names, each firm having its own name for the special product 

 that it turns out. They all depend for their therapeutic value 



